Technical Specifications Overview
The table below details the core technical parameters of this termination unit.
| Parameter | Specification |
|---|---|
| Model Number | NTCS04 |
| Product Type | Termination Unit (Thermocouple) |
| Compatible System | ABB Procontrol P14 / AC 800M Series |
| Number of Channels | 8 channels |
| Signal Type | Thermocouple (Types J, K, T, E, S, R, B, N) |
| Cold Junction Compensation | Built-in (CJC sensor) |
| Accuracy | ±0.1% of full scale (typical) |
| Temperature Drift | ±1 μV/°C (maximum) |
| Input Impedance | > 10 MΩ |
| CJC Sensor Type | Precision thermistor (on-board) |
| Terminal Type | 34-point removable screw terminal block |
| Cable Connection | 34-pin flat ribbon cable (to I/O module) |
| Dimensions (W x H x D) | 67 mm x 130 mm x 120 mm |
| Weight | 0.34 kg |
| Wire Gauge Capacity | Up to 2.5 mm² (AWG 14) |
| Mounting Type | DIN rail or direct backplane mounting |
| Operating Temperature | 0°C to 60°C |
| Relative Humidity | 5% to 95% (non-condensing) |
Precision Thermocouple Signal Conditioning
The NTCS04 termination unit provides a dedicated interface for thermocouple temperature sensors in the Procontrol P14 and AC 800M systems. This termination unit supports eight independent thermocouple channels, accommodating all common types including J, K, T, E, S, R, B, and N. A precision on-board cold junction compensation (CJC) sensor automatically adjusts for ambient temperature variations, ensuring accurate temperature readings without manual correction.
Each input channel features a high impedance of > 10 MΩ, which minimizes loading on the thermocouple and preserves signal integrity. The unit achieves a typical accuracy of ±0.1% of full scale, making it suitable for demanding temperature measurement applications in process control. The maximum temperature drift of ±1 μV/°C ensures stable performance across the entire operating temperature range.
Design for High-Accuracy Temperature Measurement
The NTCS04 eliminates the need for external cold junction references or compensation circuits, simplifying system design and reducing component count. A precision thermistor mounted on the circuit board continuously monitors the cold junction temperature, applying the appropriate compensation algorithm. This built-in compensation guarantees accurate readings regardless of ambient temperature fluctuations within the control cabinet.
The unit’s design minimizes the thermal gradient between the cold junction sensor and the terminal connections, reducing measurement errors caused by temperature differences. Careful trace routing and component placement reduce thermocouple effects on the PCB itself, maintaining high measurement fidelity.
Physical Design and Installation Features
This termination unit measures 67 mm in width, 130 mm in height, and 120 mm in depth, with a weight of 0.34 kg. The compact form factor supports high-density installations within standard control panels. Users can mount the NTCS04 on a DIN rail or directly onto the backplane, providing excellent flexibility for diverse panel layouts.
The removable 34-point screw terminal block accepts wires up to 2.5 mm² (AWG 14), ensuring reliable connections. A 34-pin flat ribbon cable connects the termination unit directly to the corresponding analog input module, creating an organized and maintainable system architecture. Each terminal clearly labels the positive and negative connections, reducing wiring errors during installation.
System Integration and Application Benefits
This termination unit serves as a complete solution for thermocouple interface requirements, eliminating separate signal conditioners and CJC modules. The NTCS04 provides a standardized interface across multiple projects, improving engineering consistency and reducing maintenance complexity. The unit operates reliably across a temperature range of 0°C to 60°C and withstands humidity from 5% to 95% (non-condensing), making it suitable for diverse industrial environments.
Details
| Weight | 0.34 kg |
|---|---|
| Dimensions | 67 × 130 × 120 mm |
